A Simple Method for the Preparation of 2-Amino-4-aryl-3-cyanopyridines by the Condensation of Malononitrile with Aromatic Aldehydes and Alkyl Ketones in the Presence of Ammonium Acetate
Nanomagnetically modified vitamin B
<sub>3</sub>
(Fe
<sub>3</sub>
O
<sub>4</sub>
@Niacin): An efficient and reusable green biocatalyst for microwave‐assisted rapid synthesis of 2‐amino‐3‐cyanopyridines in aqueous medium
Superparamagnetic nanoparticles of modified vitamin B3 (Fe3O4@Niacin) represent a new, efficient and green biocatalyst for the one‐pot synthesis of 2‐amino‐3‐cyanopyridine derivatives via four‐component condensation reaction between aldehydes, ketones, malononitrile, and ammonium acetate undermicrowaveirradiation in water. This new magnetic organocatalyst was easily isolated from the reaction mixture by
Poly N,N-dimethylaniline-formaldehyde supported on silica-coated magnetic nanoparticles: a novel and retrievable catalyst for green synthesis of 2-amino-3-cyanopyridines
作者:Sajad Asadbegi、Mohammad Ali Bodaghifard、Akbar Mobinikhaledi
DOI:10.1007/s11164-017-3200-4
日期:2020.3
Preparation and application of novel and reusable magneticnanoparticles with poly N,N-dimethylaniline-formaldehyde support as a heterogeneous basic catalyst have been described. The reported catalyst was characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, X-ray diffraction patterns, transmission electron microscopy, energy dispersive X-ray spectroscopy, thermogravimetric
Synthesis of a novel and reusable biological urea based acidic nanomagnetic catalyst: Application for the synthesis of 2‐amino‐3‐cyano pyridines
<i>via</i>
cooperative vinylogous anomeric based oxidation
作者:Morteza Torabi、Meysam Yarie、Mohammad Ali Zolfigol
DOI:10.1002/aoc.4933
日期:2019.6
In the current study, a novel and reusable biological urea based nano magnetic catalyst namely Fe3O4@SiO2@(CH2)3‐urea‐benzimidazole sulfonic acid was designed and synthesized. The structure of the titled catalyst was fully characterized using several skills including Fourier transform infrared (FT‐IR) spectroscopy, energy dispersive X‐ray (EDX) analysis, X‐ray diffraction (XRD), scanning electron microscopy
在当前的研究中,设计并合成了一种新型的可重复使用的生物尿素基纳米磁性催化剂,即Fe 3 O 4 @SiO 2 @(CH 2)3-脲-苯并咪唑磺酸。标题催化剂的结构已使用多种技能进行了全面表征,包括傅立叶变换红外(FT-IR)光谱,能量色散X射线(EDX)分析,X射线衍射(XRD),扫描电子显微镜(SEM),透射电子显微镜(TEM),热重分析/差热分析(TG / DTG)和振动样品磁力计(VSM)。然后,Fe 3 O 4 @SiO 2 @(CH 2)通过基于乙烯基的端基异构的氧化途径,成功地检测了3-脲-苯并咪唑磺酸用于多组分合成2-氨基-3-氰基吡啶衍生物。
Zinc-catalyzed multicomponent reactions: Facile synthesis of fully substituted pyridines
Abstract A first example of environmentally benign zinc complex catalyzed one-pot four-component reaction between malononitrile, ketone, ammonium acetate and aromatic aldehyde for the facilesynthesis of fully substituted pyridines just within 2 min in environmentally friendly solvent ethanol has been optimized. GRAPHICAL ABSTRACT
Iodine‐promoted facile protocol is designed for the production of pyridines at room temperature under ultrasound irradiation. Eleven pyridine derivatives in excellent yields (91–97%) are synthesized with 2 hr reaction time. Additional advantage of the proposed ultrasound‐assisted eco‐friendly, cost‐effective protocol is easy separation of product, and our in silico studies show good binding affinity